socketio engine.io

4 published vulnerabilities name this product.

As the CNAs write it in their CVE records (vendor and product); the versions are theirs.

CVEVulnerable versionsTitleSeverityPublishedEPSSExploitation
CVE-2026-59725>= 4.1.0, < 6.6.7Socket.IO: Engine.IO Polling Transport Connection ExhaustionHIGH 7.50.6 %
CVE-2023-31125>= 5.1.0, < 6.4.2Uncaught exception in engine.ioMEDIUM 6.51.3 %
CVE-2022-41940< 3.6.1 ; >= 4.0.0, < 6.2.1Uncaught exception in engine.ioHIGH 7.12.1 %
CVE-2022-21676>= 4.0.0, < 4.1.2 ; >= 5.0.0, < 5.2.1 ; >= 6.0.0, < 6.1.1Uncaught Exception in engine.ioHIGH 7.52.8 %